slp-9.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7
   8 short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9 short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 int result[N];
  11
  12 /* short->int widening-mult */
  13 int
  14 foo1(int len) {
  15   int i;
  16
  17   for (i=0; i<len/2; i++) {
  18     result[2*i] = X[2*i] * Y[2*i];
  19     result[2*i+1] = X[2*i+1] * Y[2*i+1];
  20   }
  21 }
  22
  23 int main (void)
  24 {
  25   int i;
  26
  27   check_vect ();
  28
  29   for (i=0; i<N; i++) {
  30     X[i] = i;
  31     Y[i] = 64-i;
  32     __asm__ volatile ("");
  33   }
  34
  35   foo1 (N);
  36
  37   for (i=0; i<N; i++) {
  38     if (result[i] != X[i] * Y[i])
  39       abort ();
  40   }
  41
  42   return 0;
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } }*/
  46 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  47 /* { dg-final { cleanup-tree-dump "vect" } } */
  48